I've also heard that Bohmian mechanics is deterministic (eg. http://arxiv.org/abs/1206.1084, quote from Bell, p17). But in all presentations (eg. http://arxiv.org/abs/1206.1084, p30) I've come across so far, Bohmian mechanics needs an initial probability distribution. If probability over the initial conditions is introduced, in what sense is Bohmian mechanics deterministic?